class Settings:
    """存储《外星人入侵》的所有设置的类"""
    def __init__(self):
        """初始化游戏的设置"""
        #屏幕设置
        self.screen_width = 800
        self.screen_height = 600
        self.bg_color = (230,230,230)
        self.ship_speed_factor = 1.5  # 飞船速度
        self.bullet_speed_factor = 3
        self.bullet_width = 3
        self.bullet_height = 15
        self.bullet_color = 60,60,60
        self.bullets_allowed = 3
        self.alien_speed_factor = 1 # 外星人速度
        self.fleet_drop_speed = 10
        self.fleet_direction = 1
        self.ship_limit = 3
        self.speedup_scale = 1.1
        self.score_scale = 1.5
        self.hit_score = 0
        self.initialize_dynamic_settings()

    def initialize_dynamic_settings(self):
        self.ship_speed_factor = 1.5
        self.bullet_speed_factor = 3
        self.alien_speed_factor = 1
        self.fleet_direction = 1
        self.alien_points = 50
    def increase_speed(self):
        self.ship_speed_factor *= self.speedup_scale
        self.bullet_speed_factor *= self.speedup_scale
        self.alien_speed_factor *= self.speedup_scale
        self.alien_points = int(self.alien_points * self.score_scale)
